Improvement in steam-heaters



SCHULTZ a WILSON.

Steam Heater.

Patented Nov. 10, 1868.

No. 83,885. y

/A/rf/vrops: $588@ I J4 .w

N.PETERS, PHOTO-LWHOGRAPHEN. WASHINGTON, D C.

FREDERCK W. SCHULTZ AND JOHN A. VLSON; OF BALTMORE. MARYLAND.

Letters Pate/nt No. 83,885, dated November 10, 1868.

IMPROVEMENT IN STEAM-HEATERS.

The Schedule referred E0 in these Letters Patent and making part of thesame.

.JOHN A. WILSON, of the city of Baltimore, in the county of Baltimore,and State of Maryland, have invented a new and improved Mode of 'Warmingandv Ventilating Buildings; and that the following is a full, clear, andexact description of the saine, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure lrepresents a perspective vicw ofthe apparatus.

Figure 2 represents a vertical section through the same.

Figure Srepresents a top view of the circulating coil. Similar lettersof reference, where they occur in the drawings, denotelike parts of theapparatus in all the figures.

The nature of our invention relates to the providing o1 a suitablewater-back to a kitchcn-range, from which the heated water passes into areceptacle or boiler, placed immediately adjacent to the range. and fromwhich the heated water passes through a Ycirculating coil, placed insome convenient position, and so arranged that the water will circulatefreely and rapidly when giving out its latent heat. I Y

Our invention further relates to the use of a draughtiiue, taken fromthe top of the building and brought down to the bottom of the coil, thisdraught-flue being furnished at the bottom witha valve, to prevent anvreturn upwards of the draught, and at the top with ua turn-cap, with thewings so placed as to keep the mouth of the turn-cap always before thewind.

We may also use a draught-due, taken from the outside of the building,at the nearest point to the coil, which iiue is also furnished with'avalve, to prevent any return-draught.` Both the upper and lower finesareD brought opposite each other in the air-tight box which enclosesthe`coil, from which box the heated air is taken to the diierentportions of the building by" means of ordinary ilues or pipes.

To enable others skilled in the art to make and use our lnvention, wewill proceed to describe the same with reference'to the drawings.

A represents the room or building where our apparatus is used. B is therange, which is furnished with the water-back C, which will present .tothe fire the greatest amount of heating-surface possible. 'It is forthis purpose extended upwards at C, and forms, for a short distance, theline of the range.

To thisl portion C is attached a pipe, c, (which is generally two and ahalf inches in diamcter,) which carries the heated water to the boilerD, which acts as a receptacle for the hot water.

From the top of this boiler D the pipe b carries the hot water to theheating-,coil E, which is composed of a series of cast-iron pipes, somade that the outer surface of each pipe presents the appearance of ascrew, with a number of threads around it. Each thread is raised aboutthree-iburths of an inch from the body of the pipe,and the threadsareabout half an inch apart at the top, thus presenting sharp angles at thetop and bottom, and a large heating-surface.

Each pipe (except the top and bottom pipes of the coil) is castwith thehalf of a return-bend at each end. The upper half, 1l, of thereturn-bend is dressed of a convex form, and the lower half, e, of thereturn-bend vis dressed concave, between which is introduced the softwashcrj, which makes the joint perfectly water tight, when the parts arebrought together by the rod hy and oblong clamp or washer c', againstwhich the nuts k act on the rod h.

Each half bend is cast with a projection, l, to hold the rod h orclanipt in position, and prevent them from slipping ofi'. This sameprojection l serves also to retain in place the saddles m., which areused to retain the pipes in proper position, when a large number isused, one above the other, the rod h and clamp 'i' holding them alltogether. v

The upper pipes of the coil are all attached to the pipe F, whichreceives the hot water from the pipe b, while the lower row of pipes inthe coil is attached to the pipe Gr, which returns the water, which hasbeen chilled in the coil7 back to the range B and water-back C, by meansof the return-pipes n and p.

In the construction ofthe heating-coilE, the sections are placedhorizontally together, the threads or angles nearly touching, allowingbut small spaces through which the air can pass, thus securing the fullbeneiit of all the heating-surface. tions there is left a wider space,where the kheated air can expand and pass between the tiers above.

The coil E is placed in an air-tight box, at the bottom of which entersthe cold-air flue H, which brings the cool, pure air from the top of thebuilding, where it enters the iue H, through the mouth of the revolvingcap I, the latter being always kept before the wind by the wings q.

At the bottom oi the air-flue H, where it enters the air-tight box ofthe heatingcoil E, is placed a valve, vr, opening inwards, to admit thecold air to the coil E, but preventing any returning draught. On theopposite side oi' the air-tight box, enclosing the heatingcoil E, thereis the l air-iiue H, which has a valve, fr', opening inwards, to admitthe cold air to the coil E, and prevent any return draught. The objectof this air-ilue H is to supply air to the heating-coil only when, byreason of the shifting of the wind, the revolving cap I is notoperating.

The operation of our heating-apparatus is as follows:

The cold water is admitted to the boiler D in the ordinary way, fromwhich it passes through the pipe p to the water-back C, from which itrises in the upper portion G', where it is also heated. It passes thenthrough the pipe c to the upper part of the boiler D,

'and from there, by means of the pipe b, to the coil E,

of which the screw-shaped sections getting heated,

Between the tiers of sec transmit the heat of the water to the airwhich,l has been brought from the ue H, through tlie opening closed bythe valve fr, when the chilled Water returns, by means of 'the pipe n,to the bottom of the boiler D, from which it is again transferred, bythe' pipe p, to the water-back G, to be heated again. ln this manner acontinuous ow of hot Water is passed through the coil E, and acontinuous flow of fresh and pure air is introduced round the coil,where it is warmed, and from which it is carried, by means ofordinaryues or pipes, through the building, to warm and ventilate it.I

In this manner the apparatus is self-acting, and requires no furtherattention lthan a common range. Hot water can also be drawn from theboileL for the use of the house, without affecting the operationmaterially.

Having thus fully described ou1l invention,

What We elainr therein as new, and desire to secure by Letters Patent,is-

1. In combination with the elevated water-back, the

boiler and steam-coils, made and arranged to operate substantially asand for the purpose set forth..

2. Also, the screw-thread form of the coil-pipes, when so arranged inseries that the threads of the adjacent pipes shall nearly or quitetouch each other, and leave openings between them for the air to passthrough and become heated, by im'pnging upon vthe extended surface,substantially as described.' i

3.- Also, in combination with a hot-Water heater,-

